Eccentric



(No Model.)

0. LINSTROM. IEGUENTRIG. No. 565,169.

Patented Aug. 4; 1896.-

l/VVEIVTOR 4 m/ (J/ ATTORNEY.

WITNESSES UNITED STATES PATENT OFFICE.

CHARLES LINSTROM, OF VICKSBURG, MISSISSIPPI.

ECCENTRIC.

SPECIFICATION forming part of Letters Patent No. 565,169, dated August 4, 1896.

Application filed December 19, 1895. Serial No. 572,626. (No model.)

To caZZ whom it may concern.-

Be it known that 1, CHARLES LINSTROM, a citizen of the United States, residing at Vicksburg, in the county of I'Varren, State of Mississippi, have invented certain new and useful Improvements in Eccentrics, of which the following is a full, clear, and exact specification.

This invention relates to eccentrics designed for the driving-shafts of locomotives, stationary and marine engines, and generally wherever an eccentric is used for converting motion.

The chief object of the invention is to provide a new and improved sectional eccentric which can be rigidly secured to a shaft without the use of a set-screw extending into the bore of the eccentric to bear. or act against the shaft and without liability of the sections becoming separated or disconnected from operative position.

The invention also has for its object to provide a sectional eccentric which can be rigidly clamped radially upon a shaft without the use of a set-screw and without liability of the parts being forced from their correct operative position.

To accomplish these objects, the present invention consists in the features of construction and in the combination or arrangement of parts hereinafter described and claimed, reference being made to the accompanying drawings, in which- Figure 1 is asectional viewof ashaft, showin g the improved eccentric in side elevation and clamped to the shaft. Fig.2 is a sectional elevation showing the complementary section of the eccentric separated from the main section, and Fig. 3 is a detail perspective view of the yoke-shaped clamp for rigidly securing the main section of the eccentric to the shaft.

In order to enable those skilled in the art to make and use my invention, I will now describe the same in detail, referring to the drawings, wherein The letter 0 indicates a shaft, which may be the driving shaft or axle of a locomotive, or a stationary or marine engine, or any other shaft which is to be provided with an eccentric for converting motion.

The eccentric proper is in the form of a disk, composed of a main section A and a complementary section A. The main section is constructed, as shown, with transverse perforations A and two substantially parallel passages A which extend trans verse to the geometric axis of the shaft and open at one end into the perforations A The main section is also formed integral or otherwise constructed with two opposing jaws A which are adapted to lie at opposite sides of the shaft 0, so that their abutting faces are opposite each other. The two passages A are designed to receive the arms D of a U shaped yoke D, having its circular portion adapted to partially encircle and fit against the shaft 0. The arms D of the yoke extend into the perforations A and are provided with screw-threaded extremities I), for the purpose of receiving rotary screw-nuts D in such manner that by tightening the nuts the yoke is bound upon the shaft, and the main section of the eccentric is thereby rigidly clamped in position.

The complementary section A of the eccentric is substantially in the form of a segment, adapted to be inserted between the opposing jaws A so that the extremities of the segment bear against the faces of the jaws. The complementary section is properly curved to more or less accurately fit the shaft 0, and this section is retained in operative connec tion with the main section A through the medium of transverse bolts B, which extend through bolt-holes formed partially in the jawsA and partially in the ends of the complementary section A. The bolt-holes are preferably countersunk at their extremities, so that they may receive the heads and the nuts of. the bolts, as will be obvious. The opposing jaws A serve as abutments for the ends of the complementary section, and the acting faces of the jaws are, as shown, arranged to extend in a direction transverse to the geometric axis of the shaft, so that in the rotary motion of the eccentric the jaws carry the complementary section in the circular path, and thereby relieve the transverse bolts B almost entirely of strain in the direction of motion of the eccentric.

It will be obvious that the improved eccentric can be applied to a shaft without slipping it upon the shaft from one end of the latter,

and that the eccentric can be set to the de- I sired position on'the shaft and then be rigidly clamped thereto without liability of being forced from its correct operative position.

The yoke-clamp D is preferably in the form of a flattened bar or strip of metal having cylindrical end portions which are provided with the screw-threads to engage the screwthreads of the rotary nuts; but I do not wish 1 to be understood as confining myself to this exact construction of the yoke-clamp; nor do jaws of the main section,-as this may be accomplished by any devices suitable for the pun I structed to partially encircle a shaftand hav- The passages A through which the arms: of the yoke-clamp, extend, as shown, tangen- 3 tially to the periphery of the shaft O, as by this means the yoke-clamp can be made to 1 more effectively clamp the main section 'of the pose.

eccentric radially upon the shaft. The passages r'i a're preferably arranged 'centrallyj bet-ween the opposite sides of the body'of the eccentric, but this arrangement maybe more or less varied without altering the character,

of my invention.

The curved face of the complementary section A, which is designed to fit a peripheral portionof the shaft 0, isconstructed with a segmental groove A to receive and accommodate the curved portion'o'f the yoke-clamp D,-so that'an accurate fitting of the parts is obtained, and the complementary section can be nicely set into position between the jaws of the main section.

The improved eccentric may be used for any purpose for which an eccentric is ordinarily used, but itis 'chicfly'designed. for the driving-shafts of locomotives and for the shafts of stationary and marine engines.

Having thus described my invention, what I claim is- I "1. An eccentric, consisting of a disk having an eccentric bore and composed of a main section :and a complementary section, the main section provided with opposing jaws projecting past the major diameter of the shafton which the eccentric is to be mounted and'having their inner-faces extending transversely of said shaft, a clamp constructed to engage :said shaft and extending through a part of the main section in a plane transversely to'the axis of the shaft for clamping the main section thereupon, and meansfor retaining'the complementarysection between and against the said transverse inner-faces of the opposing jaws of the main section, substantially'as described.

2. An eccentric, consisting of adis'k having an eccentric bore and composed of a main section and a complementary section, the

main section having opposing jaws with their inner faces extending transversely of the shaft on which the eccentric is to be mounted, and the complementary section being inserted between and having its ends abutting said inner faces of the opposing jaws, a clamp for rigidly clamping the main section upon the shaft, and means independent of said clamp for retaining the complementary section in operative connection with the said opposing jaws, substantially as described.

3. An eccentric, consisting of a disk having an eccentric bore and composed of two sections, one amain section having opposing jaws and the other a complementary section inserted between and having itsends abutting said opposing j aws a yoke-clamp coning its arms engaged with the mainsec'tion, nuts 'mounted on the arms of the yoke clamp, and means for retaining the complementary section in operative position, substantially as described.

a. An eccentric, consisting-of a disk havin g anecc'entric bore and c'onrp'osed'of a main section and a complementary section, the main section provided with opposing jaws extending past the major diameter of the shaft on which'the eccentric is to be mounted and having their in ner fac'es arranged transversely of said shaft, and the-complementary section constructed with'a curved'or -segn1ental groove and having its ends abutting said transverse inner fa'cesof "the opposing jaws, a yoke-clamp partially encircling the shaft, lying in the groove of the complementary section-and formed with two arms engaging the main section, nuts mounted on the arms of the yoke-clamp for causing it to rigidly secure the main section "to the shaft, and means independent of said yoke-clamp for retaining the complementaryse'ctionbetween two jaws of the main section, substantially as described.

5. The combination in an eccentric having an eccentric bore, of main-and complementary disk-sections in which said bore is formed, the complementary section havinga groove running-around aportionof thebore, and the mainsec'tion having two'passages extending transverselyto the axis of the bore, a yoke-clamp havingacurved portion fitting inthe groove of the complementary section, and two arms passing through passages in the main section, means for clamping the yoke-clampand'the'ma'in section upon a shaft, and means for retaining the complementary section in rigid connectionwith the-main-section, substantially'as described.

CHAR-LES 'IJINSTROM. WVitnesses:

G. B. HARPER, W. H. Durant. 

